“…The effect of shear rate in the viscosity of solutions of EPS was described by the kinetic model of Ostwald-de Waele: μ = K (γ) nÀ1 , where K is the consistency index, n is the index the flow behavior, μ is the apparent viscosity and γ, to shear rate. [6,21] Molar masses of EPS 1 and 2, which are expressed by the weight average molar mass (M w ), number average molar mass (M n ) and polydispersity index (PDI = M w /M n ), were obtained by size-exclusion chromatography. [13,21] EPS filtered solution (0.1%, w/v; 0.45 μm) was prepared in Milli-Q water, and approximately, 50 μl was subjected to high-performance liquid chromatography (PerkinElmer Series 200) with an autosampler and refractive index detector (PerkinElmer Series 200, Shelton, USA), equipped with Shodex SB 803, 804, 805, 806 columns in series (Kawasaki-ku, Japan) with an oven temperature of 30°C were employed for separation.…”